Fbitz babbezat



F. BARBEZAT.

WATCH. APPLICATION F`ILED PEAB-1, 1918.

1,317,474. Patented Sept. 30, 1919.

INVENTOPv rEiTz BAEEEZAT, or La CHAUX-DE-Eonns, SWITZERLAND.

WATCH.

Specification of Letters Patent. Patented Sept. 30, 1919.

Application led February 7.y 1918. Serial No. 215.745.

To all whom t may concern:

Be it known that I, FRITZ BARBEZAT, citizen of the Swiss Republic,residing at La ChauX-de-Fonds, Switzerland, have invented certain newand useful Improvements in Vatches, of which the following is aspecification.

My invention relates to watches and particularly to an improvement inthe stemwinding, stemsetting mechanism and to means for fastening thewatch movement in the casing, including a yoke connected with thewinding stem, saidyoke being operated by aXial motion of said Windingstem, the yoke being engaged in a groove provided in the stem, thusconnecting the stem with the watch movement. In the invention, theaforesaid yoke is provided with a resilient arm connected with thewinding stem which arm constantly tends to keep itself enga ed within aperipheral groove of the stem, ut may be disengaged so as to allow saidstem to be disconnected from the movement by means of a sliding memberacting on said arm and operated by hand.

On the accompanying drawing, forming part of this specification, Figure1 is a partial face elevation showing the mechanism placed under thewatch dial, whereas Fig. 2 is a partial transverse section takenapproximately, on line A-B of Fig. 1.

In the drawing, 1 represents the watchinovement and 2 the watch-case, 3the pendant with the bow thereof and 4 the winding crown adjusted to theupper end of the winding-stem 5. The winding and setting mechanism ofthe watch is of the stemwinding and stem-setting type and is provided,in addition to the stem 5 with the wheel 6 connected with the windinpinion 7 and the two yokes 8 and 9, pivote respectively in 8 and 9-10 isthe minute wheel with its pinion 11; 12 is the intermediate wheelthereof, whereas 18 represents the cannon pinion.v An arm 14 of the yoke9 is provided with a pin 15 engaged in a groove 16 of the winding stem,so that yoke 9 may be operated by axial motion of stem 5, and may act,in its turn, on yoke 8 of the wheel 6, thus causing the latter to clutchwith intermediate wheel 12 for the purpose of setting the hands. The arm14 of the yoke 9 acts as a spring in a plane normal to that of said yokeand thus constantly tends to keep within groove 16 of the stem 5 so asto connect the latter with the watch movement.

Inorder to allowof stem 5 being easily and quickly pushed in or pulledout, of the casing for detaching or attaching the movementito or fromthe watch-case, a device is provided which permits arm 14 to bedisengaged from stem 5. IhisI device includes a. lever 17 pivoted onstop-screw 18 forming pivot 8 of yoke 8. As long as arm 14 is engaged ingroove 16 of stem 5 a saddlebacked projecting piece 19 of lever 17placed under arm 14 is engaged in a corresponding notch 2O of said arm.But, on removing the lever so as to bring the latter to a position shownon the drawing in a dash-and-dot line, by moving a knob 21 provided onsaid bolt, the projecting piece 19 leaves the notch 2O and shifts thearm 14 as shown by dashand-dot line on Fig. 2. Hence, the pin 15 isdisengaged from groove 16 of stem 5 and the latter may be removed fromthe watch altogether. After having re-adjusted the stem, the latter isfastened by pushing the `lever toward its former position, so that theprojecting part 19 is rengaged into notch 2O of arm 14, which allows thelatter to return and be rengaged by the pin 15 in the groove 16 of thewinding stem. In the eX- ample shown, the lever is also used for thepurposeof fixing the movement to the watchcase. To that effect, saidlever 17 is inserted in a recess of the movement plate and reaches apoint below the watch-case flatedge 22, close to a notch 23 thereof. Thewidth of notch 28 corresponds to the width of the end of the lever 17and allows said end to pass freely when placing the movement for casingthe latter under the edge of the Watch-case. On pushing the lever to theleft (Fig. 1), said bolt is engaged frictionally under flat edge 22 by anotch 24 provided in the movement plate and simultaneously connects stem5 to the movement and the latter to case 2. To uncase the movement, thelever has but to be moved to the right, as shown by the dash-and-dotline on Fig. 1, as far as required for the end of said lever to beplaced within notch 28 of flat edge 22, a position allowing stem 5 to beset free from arm 14 thus permitting said stem to be withdrawn from thewatch.

The advantage resulting from the invention hereinbefore described iseasy and quick casing and uncasing of the movement, since saidoperations may be done without using any tool, the members connectingthe winding stein to the movement and fixing the latter to the watchcase not requiring any screws.

Having thus fully described my` invention, What I claim as new anddesire to secure by Letters Patent of the United States is,-

In combination, a Watch easing, a Watch movement including a detachableWinding and setting stem having a groove formed therein, an arm biasedtoward said stem, a pin on said arm and disposed in said groove, andmeans for actuating said arm to remove said pin from the groove, saidmeans comprising a level' operable exteriorly of the casing, andj a, camformed on the lever and actuating with the arm.

In testimony whereof I have aixed my signature in presence of tivoWitnesses.

FRITZ BARBEZAT.

Witnesses:

CH. C. KLINGEL, M. J. STEHLIN.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner` of Patents, Washington, I). C.

